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Keywords:

  • alkynes;
  • aryl ketones;
  • C[BOND]H activation;
  • indenols;
  • rhodium
Thumbnail image of graphical abstract

Ketones and alkynes join together: The catalytic title reaction proceeds rapidly at 120 °C and requires only 1 hour for completion (see scheme). The reaction mechanism likely involves chelation-assisted ortho C[BOND]H activation, insertion of the alkyne moiety, carbocyclization, and protonation. Cp*=pentamethylcyclopentadienyl.